Lesson Notes By Weeks and Term - Primary 6

How to make disinfectant

TERM: 3rd Term

WEEK: 2

CLASS: Primary 6

AGE: 11 years

DURATION: 40 minutes of 2 periods each
DATE:

SUBJECT: Prevocational Studies

TOPIC:       -    How to make disinfectant

SPECIFIC OBJECTIVES: At the end of the lesson, the pupils should be able to

  1. Explain the meaning of disinfectant
  2. Discuss uses of disinfectants
  3. Identify different types of disinfectants
  4. List the ingredients used in making disinfectants
  5. Explain the procedure in making disinfectants

INSTRUCTIONAL TECHNIQUES: Identification, explanation, playway method, questions and answers, demonstration.

INSTRUCTIONAL MATERIALS: Texapon, Phenol, Chloroxylenol, I.P.A (Isopropanol ), Pine oil, Castor oil, Colorant, Water, bucket, stirring stick

INSTRUCTIONAL PROCEDURES

PERIOD 1 and 2:

PRESENTATION

TEACHER’S ACTIVITY

PUPIL’S ACTIVITY

STEP 1

INTRODUCTION

The teacher revises the previous lesson on marketing channels

Pupils pay attention

STEP 2

EXPLANATION           

The teacher explains the meaning of disinfectants, uses of disinfectants, types of disinfectants, ingredients used in making disinfectants and how to make disinfectants

 

Disinfectants are antimicrobial agents that are applied to the surface of non-living objects to destroy microorganisms that are living on the objects. E.g.- Chlorine bleach, Dettol etc

 

Uses of disinfectants

1. It helps to protect you from stubborn germs that are resistant to detergents.

2. It can be used for cleaning of surfaces

3. to kill the germs in the air that cause respiratory infections.

4. to prevent the spread of diseases

 

Types of disinfectants include

1. Alcohol.

2. Chlorine and chlorine compounds.

3. Formaldehyde.

4. Glutaraldehyde.

5. Hydrogen peroxide.

6. Iodophors.

7. Ortho-phthalaldehyde (OPA)

8. Peracetic acid.

 

 

Pupils pay attention

STEP 3

DEMONSTRATION

The teacher lists and discusses ingredients used in making disinfectants and how to make disinfectants (for 1 litre)

1.Texapon – you will need half (1/2) cup.

2. Phenol – 1 cup.

3. Chloroxylenol 1/2 cup.

4. I.P.A (Isopropanol 1/2 liter.

5. Pine oil 1/2 cup.

6. Castor oil 1/2 cup.

7. Colorant little or as desired.

8. Water 5 tins of milk cup.

 

Methods

1. Gently pour the texapon into a big empty bowl and dissolve the phenol in it

2. Add the pine oil and stir properly

3 Add chloroxylenol and stir also

4 Add I.P.A (Isopropanol)

5. Add the castor oil and stir properly

6. Pour the water into the content and stir it very well

7. Dissolve the color in water and add to it, mix it properly, and leave to settle for a while before packaging it.

 

NOTE: The color should be added last. To know if your Dettol is well formulated, it should be able to form a milky emulsion of oil droplet when it is diluted in water

Pupils pay attention

STEP 4

NOTE TAKING

The teacher writes on the board while the pupils copy the note

Pupils copy the note

                                                                    

NOTE

Meaning of disinfectants, uses of disinfectants, types of disinfectants, ingredients used in making disinfectants and how to make disinfectants

Disinfectants are antimicrobial agents that are applied to the surface of non-living objects to destroy microorganisms that are living on the objects. E.g.- Chlorine bleach, Dettol etc

 

Uses of disinfectants

  1. It helps to protect you from stubborn germs that are resistant to detergents.
  2. It can be used for cleaning of surfaces
  3. to kill the germs in the air that cause respiratory infections.
  4. to prevent the spread of diseases

 

Types of disinfectants include

  1. Alcohol.
  2. Chlorine and chlorine compounds.
  3. Formaldehyde.
  4. Glutaraldehyde.
  5. Hydrogen peroxide.
  6. Iodophors.
  7. Ortho-phthalaldehyde (OPA)
  8. Peracetic acid.

 

Ingredients used in making disinfectants and how to make disinfectants(for 1 litre)

1.Texapon – you will need half (1/2) cup.

  1. Phenol – 1 cup.
  2. Chloroxylenol 1/2 cup.
  3. I.P.A (Isopropanol 1/2 liter.
  4. Pine oil 1/2 cup.
  5. Castor oil 1/2 cup.
  6. Colorant little or as desired.
  7. Water 5 tins of milk cup.

 

Methods

  1. Gently pour the texapon into a big empty bowl and dissolve the phenol in it
  2. Add the pine oil and stir properly
  3. Add chloroxylenol and stir also
  4. Add I.P.A (Isopropanol)
  1. Add the castor oil and stir properly
  2. Pour the water into the content and stir it very well
  3. Dissolve the color in water and add to it, mix it properly, and leave to settle for a while before packaging it.

 

NOTE: The color should be added last. To know if your Dettol is well

formulated, it should be able to form a milky emulsion of oil droplet when it

is diluted in water

 

EVALUATION:    1. Explain the meaning of disinfectants

  1. Enumerate three uses of disinfectants
  2. List the different types of disinfectants
  3. List the ingredients used in making Dettol
  4. How do we make Dettol?

CLASS ACTIVITY: Pupils in small groups, prepare dettol

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the pupils positively and marks their books



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